Integrals

這一章主要是教積分的定義，跟微積分基本定理。

Exercise

4.1

2, 4, 15, 16, 20, 24

4.2

23, 25, 32, 42, 52, 58, 59, 77, 83

4.3

9, 10, 21, 22, 25, 30, 59, 67, 84, 85

4.4

5, 7, 23, 24, 29, 31, 61, 62, 63, 64, 75, 77

4.5

2, 4, 10, 12, 15, 16, 37, 39, 44, 45, 59, 67, 68, 75, 80